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International Journal of Tropical Agriculture
Vidya International Publishers
International Journal of Tropical Agriculture

Vidya International Publishers

0254-8755

International Journal of Tropical Agriculture/Journal International Journal of Tropical AgricultureSCI
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    In Vitro Development of Interspecific Hybrids and Isozymic Confirmation of Hybridity in Cotton

    V. P. BhadanaShiv DattJogendra Singh
    5页
    查看更多>>摘要：In vitro development of interspecific hybrids was studied involving four Indian varieties viz; Vikas and LH 900 (Gossypium hirsutum), Lohit and BD-5 (G. arboreum) and two wild species, namely G. australe and G. bickii Cultivated varieties were used asfemale parents and their stigmas were smeared with modified Taylor's medium before pollination. Successful development of hybrids could be achieved in two interspecific crosses viz; Lohit x G. australe and BD-5 x G. australe. Effect of smearing stigmaswith Taylor's medium was found to be worth, as smearing enhanced the recovery of hybrid embryos to a greater extent. The leaves of interspecific hybrids were intermediate in shape than those of the parents and resembled more with female parents as havinglob ed structure. The length and breadth of the leaves of hybrids in both the crosses were exceeded over the parents. The length of petiole was also exceeded over the parents. Vie hybridity was confirmed through isozymic analysis. Esterase and peroxidase banding pattern and intensity in hybrids was intermediate to their parents.
      原文链接:
    • NSTL

    An Integrated Approach for Ground Water Resources Mapping Using Remote Sensing and Geographical Information System

    S. S. AsadiS. Srinivasulu
    7页
    查看更多>>摘要：Today, demand for water is increasing due to rapid urbanization, industrial growth and agricultural utilizations. The levels of groundwater are decreasing over year to year due to the above activities, decrease in annual rainfall and increasing runoffdue to urbanization and deforestation (Suhasetal 2002). Hence, it is necessary to increase groundwater levels in the perspective of groundwater use for future demand. Keeping this in view, a model study to increase groundwater levels is carried out using remote sensing and Geographical Information System (GIS) for a part of Mahabubnagar and Hyderabad districts of Andhra Pradesh (AP). The present study aims to delineate ground water prospect zones using fused IRS-ID PAN and LISS-III geocoded satellite date n 1:50000 scale. The information on base, drainage, lithology, structure, land use/land cover, slope, geomorphology and hydrology maps were generated and integrated to prepare a final ground water prospect map for the study area. GIS was used to prepare database on the above layers, analyze their relationship and integrated map preparation. Based on the above thematic maps characteristics, four categories of ground water potential zones viz., very good-good, good-moderate, poor-nil and nil are delineated. The study focuses on the utility of remote sensing data in he identification of suitable zones for groundwater exploration even in a complex terrain. The result in the form of integrated map could be properly analyzed using the advantage of advanced technology of Remote Sensing and GIS, as the methodology included analysis of many resources and their interpretation. In the final map, artificial recharge structures to increase groundwater levels in low ground water potential areas are recommended.This type of integrated study is very useful for the decision makers to protect the natural resources and for sustainable development.
      原文链接:
    • NSTL

    Supply Response of Farmers in Tamil Nadu: A Farm-Profit Function Analysis

    S. MuraligopalK. GovindarajanT. R. Shanmugam
    6页
    查看更多>>摘要：Supply response due to price incentives is one of the major contributions to agricultural production. It is therefore appropriate to try and determine how responsive farmers are to the resulting price incentives. The influencing factors can be categorized as price and non-price factors. The key non-price factors that condition the farmers' response, such as rainfall and infrastructure, are rarely taken into account. In this context, a study has been attempted with the objective of finding farmers' responsiveness to price and non- price factors in Tamil Nadu.In the estimation, three crops, two variable inputs, chemical fertilizer and labour, and three fixed inputs, land (adjusted for quality), animal power and farm capital, are used in the final estimation. Two 'exogenous' controls are also included viz. market access, and rainfall. The system of three output supply equations and one input demand equation (fertilizer) is estimated using iterative Seemingly Unrelated Regression.Given the features of farming community in the state, getting prices right is not in itself an adequate policy to increase output and productivity in agriculture. Outputprices are clearly an important part of the incentive structure, but non-price factors are the binding constraints. Therefore, in addition to price incentives, effective policies that improve farmer's access to land, credit and inputs, and public investment in roads and irrigation, are required. Such policies are likely to have a directeffect on output, facilitating increased profitability, but equally important are the indirect effects by encouraging usage of recommended dose of fertilizer.
      原文链接:
    • NSTL

    Effect of Nutrients and Plant Growth Regulators on the Quality Parameters and Yield of BailyChrn (ZeanaysL.)

    S. RathikaK. VelayudhamN. Thavaprakaash
    4页
    查看更多>>摘要：A field experiment was conducted during late rabi 2006-07 as On Farm Research at Chinnamathampalayam village ofCoimbatore district, Tamil Nadu to study the effect of nutrients and plant growth regulators on the quality parameters and yield of baby corn. The treatment consists of foliar application of nutrients (Ureal% and DAP 2%), plant growth regulators [Mepiquot chloride (MC) @ 200 ppm, Pink Pigmented Facultative Methalotrophs (PPFMs) @ 5 lit ha'1, Brassinosteroid (BR) @ 0.3 ppm, Nitrobenzene (NB)@ 0.3 ppm and Ethrel @ lOOppm] and water spray as control. Tlie results revealed that the quality parameters viz., total sugar, protein and crude protein content were found to be higher with the application ofMC @ 200 ppm followed by PPFMs @ 5 lit ha1. Other quality parameters like starch content, vitamin A and C content were not altered by the plant growth regulators and nutrients application. Foliar spray of PPFMs @ 5 lit ha'1 resulted in higher crude protein and fibre content of fodder followed by BR@ 0.3 ppm and urea(l%). Tlie green cob and green fodder yield were found to be higher (7785 kg ha-1 and 34.6 t ha1) under PPFMs @ 5 lit ha1.
      原文链接:
    • NSTL

    Yield Parameters and Yield of Baby Corn (Zea Mays L.) as Influenced by Nutrients and Plant Growth Regulators

    K. VelayudhamN. ThavaprakaashS. Rathika
    4页
    查看更多>>摘要：A field experiment was conducted during late rabi 2006-07 as On Farm Research at Chinnamathampalayam village ofCoimbatore district, Tamil Nadu to study the influence of nutrients and plant growth regulators on the productivity of baby corn. Tlie treatment consists of foliar application of nutrients (Urea 1 % and DAP 2%), plant growth regulators [Mepiquot chloride (MC) @ 200 ppm, Pink Pigmented Facultative Methalotrophs (PPFMs) @ 5 lit ha'1, Brassinosteroid (BR) @ 0.3 ppm, Nitrobenzene (NB) @ 0.3 ppmand Ethrel @ lOOppm] and water spray as control. The results revealed that the application of PPFMs @ 5 lit ha1 significantly improved the yield parameters viz., length, diameter, weight of cob and corn and it was on par with MC @ 200 ppm. However, thesetreatments were not found to have significant influence in number of cobs plant1, cob -corn ratio and liarvesting period. The green cob and green fodder yield were found to be higher (7785 kg ha1 and 34.6 t ha1) under PPFMs @ 5 lit ha1.
      原文链接:
    • NSTL

    Relative Efficiency of Tillage and Organic Manures on Moisture Use Efficiency, Nutrient Uptake, Productivity and MeanEconomic of Pearlmillet [Pennisetum glaucum (L.) R. Br. Emend Stutz] Under Rainfed Conditions

    Rajpal MeenaR. C. GautamRameshwar Dayal
    4页
    查看更多>>摘要：A field experiment was conducted on sandy clay loam soil at Indian Agricultural Research Institute, New Delhi during kharif season of 2000 and 2001 to study the effect of organic maturing and cultural operations on yield, yield attributesm, quality and use of soil moisture by pearlmillet crop under rainful conditions. The daily rate of water use, consumptive use of water, water use efficiency, grain and stover yield and nutrient uptake by pearlmillet increased considerably due to organic manuring viz. FYM, crop residues incorporation , green manure incorporation, seed treatment with biofertilizers and summer ploughing. Grain and stover yield, yield contributing attributes and use of soil moisture viz. daily rate of water use, consumptive use of water and water ruse efficiency increased significantly due to summer ploughing with FYM incorporation before sowing the crop followed by crop residues incorporation with summer ploughting as compared to unploughed field and rest of the treatment.
      原文链接:
    • NSTL

    Effect of Graded Doses of NPK Fertilizers on Tuber Yield of Different Potato {Solarium tuberosum L.) Varieties

    K. K. JhaAmrit Kumar JhaDeepshikha H. T. Bedia
    3页
    查看更多>>摘要：A field experiment was conducted with three potato varieties (Kufri Kanchan, Kufri Giriraj and Kufri Chipson 1) and five levels of NPK fertilizers (No NPK, NPK @ 80:50:50 kg ha1, NPK @ 100:70:70 kg ha1, NPK @ 120:90:90 kg ha'1 and NPK @ 140:110:110 kgha1) to study the effect on growth attributing characters like number of tuber per plant, weight of tuber and yield during 2005-06. The potato cv. Kufri Chipsona 1 was found to be best for growth attributing characters and tuber yield. However NPK fertilizers @ 120:90:90 kg ha1 significantly influenced the growth attributing characters and NPK fertilizer @ 140:110:110 kg ha'1 produced significantly higher tuber.
      原文链接:
    • NSTL

    Quality of Potato (Solanum tuberosum L.) Tubers as Affected by Varieties and NPK Levels

    Amrit Kumar JhaDeepshikha H. T. BediaK. K. Jha
    2页
    查看更多>>摘要：The present investigation consisted of three potato varieties (Kufri Kanchan, Kufri Giriraj and Kufri Chipsona 1) and five levels of NPK fertilizers (No NPK, NPK @ 80:50:50 kg ha1, NPK @ 100:70:70 kg ha1, NPK @ 120:90:90 kg ha1 and NPK @ 140:110:110 kg ha'1) was conducted during 2005-06 to study the effect on quality of potato tubers like total sluble solid (*Brix) and dry matter percentage. It was found that potato cv Kifri Chipsona 1 showed maximum total soluble solid at 100:70:70 kg NPK per hectare. The highest dry meter percentage was also recorded by potato cv Kufri Chipsona 1 at 140:110:110 kg NPK per hectare. (Key Words: Effect of NPK levels, effect of potato varieties, total soluble solid, dry matter percentage).
      原文链接:
    • NSTL

    Ovo-larvicidal Performance of Certain Acaricides on Spider Mites, Tetranychus urticae Koch on Okra

    R. N. SinghSalauddin
    5页
    查看更多>>摘要：Mites play an important role in Indian agriculture, as many species are phytophagous or predatory in habit. The spider mite, Tetranychus urticae Koch (Acari: Tetranychidae) is the most injurious mite pest having worldwide distribution in economic crops. Hie frequent application and excessive use of pesticides, fertilizers with improved cultural practices have probably supported the increase in the population of this mite pest.An overall perusal of work done in India and abroad reveals that the use of suitable acaricide which are able to manage this mite Tetranychus urticae Koch. Tlie present laboratory studies were endeavored in this direction to find out the ovicidal activity and effect on hatchability of different acaricides. In this study, three acaricides i.e. propargite (57 EC), ethion (50 EC) and sulphur (80 WP) and a wetting agent (dhanuvit) with propargite in three different concentration were used. Propargite and propargite + dhanuvit (1 ml) were used at three concentrations (0.180, 0.178 and 0.176). The other acaricides ethion (0.05, 0.048 and 0.046) and sulphur (0.250, 0.248 and 0.246) were used at different three concentrations. The ovicidal test was initiated by spraying on the eggs with acaricides at three different concentrations. After 72 hrs propargite + dhanuvit, propargite, ethion and sulphur showed ovicidal activity at different toxicity levels. Propargite + dhanuvit showed, 97.33, 93.33 and 92.00% ovicidal activity: single propargite showed, 93.33, 89.33 and 86.66% ovicidal activity: ethion showed, 92.00, 86.66 and 84.00%> ovicidal activity and sulphur showed, 90.66, 86.66 and 80.00%> ovicidal activity. Propargite + dhanuvit andpropargite showed bestefficacy. Same acaricides was showed their effect on hatchability also. Dhanuvit + propargite showed, 2.67, 5.33 and 11.33%;propargite, 6.67, 9.33 and 12.00%; ethion, 9.33, 13.33 and 16.00%, and sulphur, 9.33,13.33 and 18.67% effect on hatchability of eggs of Tetranychus urticate Koch.Propargite + dhanuvit and propargite were the best acaricides and provided maximum ovicidal activity. Ethion and sulphur were less effective in comparison to propargite against Tetranychus urticae Koch. Thus, the present findings may serve as a ready reference indicating the present status of ovicidal action and hatchability tests of some acaricides against spider mite, Tetranychus urticae Koch.
      原文链接:
    • NSTL

    Influence of Integrated Nutrient Management Practices on Yield Attributes and Yield of Wet Seeded Rice (Oryza sativa L.)-Cotton (Gossypium hirsutum L.) Cropping Sequence

    M. SenthiveluB. J. PandianA. C. Surya Prabha
    8页
    查看更多>>摘要：To study the influence of integrated nutrient management practices on yield attributes and yield of wet seeded rice and cotton under sequential cropping system, a field experiment was conducted during rabi and summer season (Oct.-July) of 2001-02 at wetland of Central farm, Agricultural College and Research Institute, Tamil Nadu Agricultural University, Killikulam (8° 48' N 77°42' E and 40m above mean sea level). The experiment was laid out in split - plot design with three replication. Integratednutrient management practices to direct wet seeded rice were allotted to the main plots and nutrient management practices to succeeding cotton were assigned in the subplots. Eleven treatments were planned and executed in wet seeded rice viz., pre sowingof Sesbania aculeata @ 50 kg seeds ha~(-1), in situ incorporation at 45 DAS + 100 % RDF (150:50:50 Kg NPK ha~(-1)), pre sowing ofSesbania aculeata @ 75 kg seeds ha1, in situ incorporation at 45 DAS + 75 % RDF (112.5: 37.5:37.5 Kg NPK ha~(-1)), intercropping ofSesbania aculeata @ 25 kg seeds ha~(-1) and incorporation at 40 DAS + 100 % RDF, intercropping of Sesbania aculeate @ 37.5 kg seeds ha~(-1) and incorporation at 40 DAS +75% RDF, GLM (Glyricidia) @ 6.251 ha~(-1) +100 % RDF, GLM (Glyricidia) @9.75t ha~(-1) + 75 % RDF, FYM@ 12.51 ha~(-1) + 100% RDF, FYM@ 18.751 ha~(-1) + 75 % RDF, 100 % RDF alone (150:50:50 Kg NPK ha~(-1)), 75 % RDF alone (112.5:37.5:37.5 Kg NPK ha~(-1)) and control. In residual cotton four nutrient management practices were adoptedviz., 100 % RDF (60:30:30 kg NPK ha~(-1)), 75 %> RDF (45:22.5:22.5 kg NPK ha~(-1)), 50 % RDF (30:15:15 kg NPK ha~(-1)) and control. In wet seeded rice, treatment receiving FYM @ 22.5 t ha~(-1) + 150:50:50 kg NPK ha~(-1) registered significantly higher number of productive tillers (526 m~(-2)), number of filled grains panicle~(-1)(94.3), test weight (22.2 g), grain yield (5538 kg ha~(-1)) and straw yield (8693 kg ha~(-1)) than inorganic fertilizer alone and control and was on par with pre sowing of Sesbania aculeata @ 50 kg seeds ha~(-1), in situ incorporation at 45 DAS +100 % RDF (150:50:50 Kg NPK ha1). In succeeding cotton, residual effect of application of FYM @ 12.51 ha1 + 150:50:50 kg NPK ha1 to rice, significantly enhanced the yield attributing characters viz., number of fruiting points plant1 (30.8), number of bolls plant1 (15.8), boll weight (2.94 g), seed cotton yield (1297 kg ha~(-1)) and stalk yield (2783 kg ha~(-1)). Similarly, direct effect of application of inorganic fertilizer at 100 % RDF (60:30:30 kg NPK ha~(-1)) also significantly improved the number of fruiting points plant~(-1) (31.3), number of bolls plant~(-1) (16.6), boll weight (3.12 g), seed cotton yield (1402 kg ha~(-1)) and stalk yield (2876 kg ha~(-1)) than lower levels ofinorganic fertilizer application.
      原文链接:
    • NSTL